Valve-controlling mechanism



G. coRELLA AND e. LoNGoNl.

VALVE CONTROLLING MECHANISM.

APPLlCATlON FILED DEC.24, 191?- 2- SHEETS-SHEET Patented May 2, 1922.

G. CO'RBELLA AND G. LONGONI. VALVE CONTROLLING MECHANIISIVI.

APPLICATION'FILED DEc.24.'1 911.

Patented May 2, 19224 ,2 SHEETS-SHEET 2.

unirse sTATEs PATENT Aofsrice.

GAETANO CORBLLA AND GUALTIERO LONGONI, F MILAN, ITALY. Y

' vAEv'E-coNTRoLmivG MECHANISM.

Patented May. 2, 1922.

Application led December 24, 1917. Serial No. 209,428.

(GRANTED UNDER THE `rnovrsrorrs Aor THE ACT 0E MARCH a, 19,21, 41sTATfE, 131s.)

To all 'whom t may concern:

Be it known that we, GAETANO CORBELLA and GUALTIERO LoNGoNI, sub'ects ofthe King of Italy, residents of l ilan, in the Kingdom of Italy, No. 3Via Lavanderie Sociali, Milan, have invented new' and useful nism, (forwhich we have filed application in Italy Nov. 18, 1916, patent grantedNov. 30, 1916, No. 156,920, Gen. Reg.,) of which the following is aspecification.

The object of the present invention is an improvement in the mechanismfor operating valves7 especially for internal combustion engines,greater lightness and simplicity being obtained than with the mechanismsused heretofore.

rIhe annexed drawings sho-w one method'l of carrying the invention intoeffect by way of example. v i .Y

Fig. 1 shows in section the cylinder head of an internal combustionengine fitted with valve controlling mechanisms according to the presentinvention". I

Fig. 2 shows a detail of the operating mechanism of coaxial valves.

Figs. 3 and 4 show'a modiliedvalve operf ating mechanism in side lviewand spectively. r

-wand -bare coaxial valves. The inner one ahas for its seat the innerperiphery of the outer valve Z9- -gis the spindle of ctand -L is thehollow :spindle of -b--g bothspindles are operated against the action ofthe respective plan resprings -cand -clbearing against discs -eand-frespectively.

As indicated in the drawing,'both valves are operated by one and thesame cam actuating a rod ?1- hinged to one end of the double arm lever-L-. The opposite end of the lever -Z- is fork-shaped and' the twofork-Shanks -Jmractuate the disc fof the valve -bdirectly, whilstv thespind le -gof the valve af/ is actuated by the lever -Z indirectlythrough the bolt wf and double arm lever -p--, the bolt -n beingvertically slidable in the guiding support -grigidly secured to thecylinder end, andV the lever pbeing pivotally mounted on a fixed bracketlikewise rigidly secured to the cylinder end and facing the top end ofthe spindle -g-.

Consequent on this arrangement the valves c4- andl ZJ- are actuatedalternately, that is to say, when -the end 1mofthe lever Z presses downkand opens the valve b, it does not operate the spindle -g.- of the valve-a-, which conse- VquentlyV remains closed,whereas 'when theImprovements 1n Valve-Controlling Mechaend fm-of the lever Z- is raisedand releases the disc -f-' thus leaving the valve -bclosed, the bolt-ncauses the lever --pto swing on its pivot and its end of which ispivotally connected to said lever -ZE- Thev other end of 'link ispivoted at -r-to one 'sof a pair of levers s and -srespectivelyfulcrumed at -tandr -tin a'suitable support (not shown), which may be apivotally supported in the embodiment shownV in Fig. 1. The levers -sand-sare pivotally connected with one-anfother as by a pin and slotconnection shown at u, the outer end fv of the lever Y -sbeing adaptedto act upon the spindle -g-. As may be readily seen, the ends -vand -mofthe opposite sides .-Z- and -s-sof the articulated parallelogram willmove in opposite directions upon actuation of the pivoted end of lever-Z-. In other words by depressing the pivoted end of lever -Z- the parts-oand 'mwill be moved towards'each other as shown in dotted lines inFig. 3, and

by raising the pivoted end of lever -Z-- ating said valves, said meanscomprising two valve controlling levers pivoted in said sup- :Lid

port, an actuating' member adapted to move in opposite directions and sooperate one of. said levers, and a member interposed between said leversand movable lrelatively f ing a sliding engagement WithV Asaid support.V

`lrln a valve controlling mechanism, the

combination lwith twovalves, of a stationary support and means foroperating said valves,

said Ameans'eomprising tvvovalve controlling levers Vpivoted in saidsupport, an actuating memberadapted to move in oppositeV directions andso operate one of said levers, and

' a bolt engaging said levers on opposite sides of their respectivepivots, said bolt ,being slidably mounted in said support;v

In testimony whereof We aHiX our signatures.

G. CORBELLA.

Witnesses ILO C. FUNK,

` IvANV LAvETsKY.

GUALTIERO LONGONL

